Is the binaryness/textness of a data format a property?

[Costello, Roger L. via Unicode]

Hello Data Format Experts!

[Definition] Property: an attribute, quality, or characteristic of something.

JPEG is a binary data format.
CSV is a text data format.

Question #1: Is the binaryness/textness of a data format a property? 

Question #2: If the answer to Question #1 is yes, then what is the name of this binaryness/textness property?

Question #3: Here is another way of asking Question #2: Please fill in the following blanks with the property name (both blanks should be filled with the same thing):

For the JPEG data format:  _____ = binary.
For the CSV data format:  _____ = text. 

/Roger